Are there any requirements regarding the wall thickness of the main pipe when using branch pipe bases?
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When choosing a branch pipe support, it is necessary to consider that once the diameter of such a support reaches a certain level, its weight increases significantly; this may have an impact on the wall thickness of the main pipe. Could those with experience share some insights on this?
Generally, the thickness of the main wall is determined first, after which the branch pipe supports are selected, ensuring that the strength is at least equal. Generally, the pressure rating of branch pipe bases is quite high, so there’s no problem. Regarding the issue mentioned by the poster about large weight at a certain diameter, it is advisable to choose reducing tees as much as possible. In short, when standard parts are available, choose them first.
The diameter of ordinary branch valves (ollets) does not exceed DN200
Thank you both for your generous assistance. I’m not quite sure about the statement that \"usually, the wall thickness of the main pipe is determined first, after which the branch pipe supports are selected; at least the strength levels should be equal.\" According to the standards for branch pipe supports, the grade specified corresponds to the wall thickness of the connecting pipes. The requirement to provide the wall thickness of the main pipe is merely for determining the dimensions needed for processing at the bottom. That’s my understanding. My question is this: when the main pipe is relatively thin, such as DN900 with a wall thickness of 10 mm, I choose a DN200 branch fitting rated at 3000 LB for connection. Will the weight of the DN200 branch fitting have an impact on the main pipe? Has anyone paid attention to this issue?